Ohm's Law

The relationship between voltage, current, and resistance through a wire is summed up in:

Ohm’s Law

What does Ohm’s Law state?

That voltage (potential difference) in volts is equal to the current in amperes multiplied by ohms

What is the formula for Voltage?

V=IR

What is voltage also known as?

Potential Difference

What is Current defined as?

The amount of charge flowing past a point per unit time as the intensity of charge flow

What is the voltage source?

The beginning and end of the circuit

What does the negative side do?

Repel electrons, forcing them to move through the circuit

What does the positive side do?

Help by attracting electrons

An electron emitted from the negative side will:

Eventually traverse the complete circuit before arriving at the positive side

Voltage is essentially electric pressure on:

A charged object

How is the voltage source ultimately responsible for electric flow in a circuit?

By pushing the electrons forward

What will a non zero voltage produce?

A certain amount of current in a closed circuit for a given resistance, as shown by Ohm’s law above

Why is a Battery considered a voltage source?

It generates a potential difference (voltage) between its positive and negative terminals due to chemical reactions occurring within the battery

What is an example of a voltage source?

A 12 V battery

A household electrical socket also provides voltage which comes from where?

The power plant

Why is a household electrical socket referred to as a power source?

Because the electrical current they create carries energy

What is the wire that connects the load(s) and voltage source?

The Conductor

For the sake of simplicity, the wire is often considered to have:

Zero Resistance

The resistance in a conducting wire is often small enough compared to:

Any given load that it can be ignored for most calculations

At zero resistance, Ohm’s law requires the voltage across such a conducting wire to also be zero meaning?

The electrical pressure does not change from one side to another

A load is any component with:

Resistance that converts electrical energy into some other energy form

In accordance with Ohm’s law, where a load’s resistance to decrease:

The current flowing in the circuit would increase

What would happen if the circuit was broken as in the wire(conductor) was disconnected?

No current would flow

What is an open circuit referred to as?

A circuit that is broken